package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.reportService;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
@Slf4j
public class reportServiceImpl implements reportService{

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    /**
     * 指定时间区段的营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        //插入begin-end 之间的日期
        List<LocalDate> dateList =new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList =new ArrayList<>();
        for (LocalDate time : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(time, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(time,LocalTime.MAX);
            //查数据库
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover= orderMapper.sumByMap(map);
            turnover=turnover==null? 0.0:turnover;
            turnoverList.add(turnover);
        }



        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserReportStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }


        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate time : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(time,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(time,LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);
            //获得用户的总量
            Integer totalUser=userMapper.countByMap(map);
            map.put("begin",beginTime);
            //获得用户增量
            Integer newUser= userMapper.countByMap(map);

            newUserList.add(newUser);
            totalUserList.add(totalUser);

        }


        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderReportStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //每日订单数
        List<Integer> orderCountList=new ArrayList<>();
        //每日有效订单数
        List<Integer> validOrderCountList=new ArrayList<>();

        for (LocalDate time : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(time,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(time,LocalTime.MAX);
            //得到每日订单数
            Integer orderCount= getOrderCount(beginTime,endTime,null);
            //得到每日有效订单数
            Integer validOrderCount=getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //订单总数
        Integer totalOrderSum=orderCountList.stream().reduce(Integer::sum).get();
        //有效订单数
        Integer validOrderSum=validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrderSum!=0){
            orderCompletionRate=validOrderSum.doubleValue()/totalOrderSum;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderSum)
                .validOrderCount(validOrderSum)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }


    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }


    /**
     * 查询销量排名top10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin,LocalDate end){
        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names= salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        String nameList = StringUtils.join(names, ",");
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }
}
